There are more than 700 species of ant species found in the U.S., although only about 25 species commonly infest homes. Ants are social insects that typically live in underground colonies, made up of workers and a queen. Ants will eat practically any kind of food, but are especially attracted to sweets. Ants are easily identifiable due to their three distinct body regions; head, thorax, and abdomen, as well as antennae.